Source: https://seerepo.com/compare/graphile/crystal/vs/RocketChat/Rocket.Chat
Markdown source: https://seerepo.com/compare/graphile/crystal/vs/RocketChat/Rocket.Chat.md
Description: crystal and Rocket.Chat share 5 technologies: Express, Hono, React, @hono/node-server, and react-error-boundary. Both are written in TypeScript.

# crystal vs Rocket.Chat

crystal and Rocket.Chat share 5 technologies: Express, Hono, React, @hono/node-server, and react-error-boundary. Both are written in TypeScript.

- [graphile/crystal](https://seerepo.com/r/graphile/crystal): 🔮 Graphile's Crystal Monorepo; home to Grafast, PostGraphile, pg-introspection, pg-sql2 and much more!
- [RocketChat/Rocket.Chat](https://seerepo.com/r/RocketChat/Rocket.Chat): The Secure CommsOS™ for mission-critical operations

## What they share and what sets them apart

- In common: Express, Hono, React, @hono/node-server, react-error-boundary
- Only in crystal: Postgres, Fastify, Koa, graphql-http, @whatwg-node/server, H3, graphiql, Mermaid, @graphiql/toolkit, jsonwebtoken
- Only in Rocket.Chat: Vite, MongoDB, bson, ldapjs, aws-sdk, connect-mongo, Google Cloud, localforage, AWS S3, RTM, connect, Moleculer, @slack/bolt, react-router-dom, polka, mongo-message-queue, Preact, preact-router, history, GitHub, LiveKit, stylis, React Hook Form, react-aria, react-virtuoso, Chart.js, nivo, virtua, codemirror, swagger-ui-express, Swiper, emojibase-data, Passport, bcrypt, @node-oauth/oauth2-server, express-session, generate-password, passport-apple, passport-github2, passport-google-oauth20, passport-oauth2, speakeasy, xml-encryption, dompurify, sharp, @xmldom/xmldom, mailparser, nodemailer, csv-parse, exif-be-gone, file-type, highlight.js, string-strip-html, @react-pdf/renderer, he, imap, is-svg, json-2-csv, juice, marked, sanitize-html, yaqrcode, Zod, Ajv, cron-validator, prom-client, bugsnag, docker-compose, node-dogstatsd, pino, prometheus-gc-stats, reactflow, @hello-pangea/dnd, @lezer/highlight, rc-scrollbars, react-split-pane, jose, Cheerio, typia, css-mediaquery, style-dictionary, react-stately, katex, css-vars-ponyfill, emoji-mart, mdast-util-to-string, remark-parse, remark-stringify, unified, ajv-formats, opentelemetry, @react-aria/visually-hidden, overlayscrollbars-react, overlayscrollbars, re-resizable, @react-aria/toolbar, @livekit/components-react

## Side by side

| | crystal | Rocket.Chat |
|---|---|---|
| Size | 878,730 lines written, 536 code files | 943,798 lines written, 8,398 code files |
| Who writes it | 0% of its commits signed by AI. With GitHub Copilot | 1% of its commits signed by AI. With Claude Code, GitHub Copilot, CodeRabbit, Cursor, and Devin |
| Activity | Last push November 9, 2026, 15,796 commits, 12,934 stars | Last push November 10, 2026, 25,089 commits, 46,384 stars |
| Tests | 250 test files. 5.6% of its code files have a test that imports them | 2,085 test files. 17.8% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, crystal or Rocket.Chat?

Rocket.Chat, with 943,798 lines written; crystal has 878,730.

The proof: [RocketChat/Rocket.Chat's code at commit f37d829](https://github.com/RocketChat/Rocket.Chat/tree/f37d829885e89b3dc3bd22e1eac06d0e005fd644)

### Which has more GitHub stars, crystal or Rocket.Chat?

Rocket.Chat, with 46,384 stars; crystal has 12,934.

The proof: [RocketChat/Rocket.Chat on GitHub](https://github.com/RocketChat/Rocket.Chat)

### Which has more tests, crystal or Rocket.Chat?

Rocket.Chat, with 2,085 test files; crystal has 250.

The proof: [RocketChat/Rocket.Chat's code at commit f37d829](https://github.com/RocketChat/Rocket.Chat/tree/f37d829885e89b3dc3bd22e1eac06d0e005fd644)

### Which was updated more recently, crystal or Rocket.Chat?

Rocket.Chat: its last push was on November 10, 2026, and crystal's on November 9, 2026.

The proof: [RocketChat/Rocket.Chat's commits on GitHub](https://github.com/RocketChat/Rocket.Chat/commits)

### Which has more commits signed by AI, crystal or Rocket.Chat?

Rocket.Chat: an AI signed 1% of its commits, with Claude Code, GitHub Copilot, CodeRabbit, Cursor, and Devin.

The proof: [the commits each tool signed in RocketChat/Rocket.Chat](https://seerepo.com/r/RocketChat/Rocket.Chat/ai)

## Sources

- graphile/crystal: Read on November 10, 2026, at commit 1c037b4 (https://github.com/graphile/crystal/tree/1c037b4fbfcbb3736d3483ac04de711db4f8d09e)
- RocketChat/Rocket.Chat: Read on November 10, 2026, at commit f37d829 (https://github.com/RocketChat/Rocket.Chat/tree/f37d829885e89b3dc3bd22e1eac06d0e005fd644)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.